I only read this just now and after glancing the comments I'm surprised that Watanabe is disliked, she isn't mean or anything, just... over the top awkward.
Right??? That's what I've been thinking! Maybe that's just because I was (and am, tbh >.<) always super awkward too, but still. She's just oblivious and sees the world differently than most (which makes her awkward). Maybe it's my autism talking, but I honestly find her character funny and (somewhat) relatable.
But then, people always disliked/avoided me, too, growing up, so. Probably not the best example, lol.